A、CASCADE
B、UNIQUE
C、NONUNIQUE
D、CHECK
E、PRIMARY KEY
F、CONSTANT
H、NOT NULL
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A、A. CASCADE B、B. UNIQUE C、C. NONUNIQUE D、D. CHECK E、E. PRIMARY KEY F、F. CONSTANT H、G. NOT NULL
A、A.p0 = p1; B、B.p1 = p2; C、C.p2 = p4; D、D.p2 = (ClassC)p1; E、E.p1 = (ClassB)p3; F、F.p2 = (ClassC)p4;
A、The valid time columns employee_time_start and employee_time_end are automatically created. B、The same statement may filter on both transaction time and valid temporal time by using the AS OF TIMESTAMP and PERIOD FOR clauses. C、The valid time columns are not populated by the Oracle Server automatically. D、The valid time columns are visible by default when the table is described. E、Setting the session valid time using DBMS_FLASHBACK_ARCHIVE.ENABLE_AT_VALID_TIME sets the visibility for data manipulatio
A、There are two broadcast domains in the network. B、There are four broadcast domains in the network. C、There are six broadcast domains in the network. D、There are four collision domains in the network. E、There are five collision domains in the network. F、There are seven collision domains in the network.
A、There are two broadcast domains in the network. B、There are four broadcast domains in the network. C、There are six broadcast domains in the network. D、There are four collision domains in the network. E、There are five collision domains in the network. F、There are seven collision domains in the network.
A、There are two broadcast domains in the network. B、There are four broadcast domains in the network. C、There are six broadcast domains in the network. D、There are four collision domains in the network. E、There are five collision domains in the network. F、There are seven collision domains in the network.
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